摘要
为了提高单位体积吸附剂的天然气储存量 ,对由含碳原料制备的高表面富微孔粉体吸附剂进行块体化被认为是有效的方法。研究表明 ,粘接压缩成型是一种实现粉体天然气吸附剂块体化的较好技术 ,但粘接剂对块体吸附剂的微观结构影响还鲜见报道。文章利用比表面—孔分布和扫描电子显微镜测定了粘接成型型炭的微观结构 ,研究了粘接剂对型炭微观结构的影响并对型炭吸附剂的构性关系 ,并进行了初步讨论。结果表明 ,粘结剂种类及其含量决定了型炭的微观结构 ,Cx - 3型炭具有缠绕联接的体型结构 ,其表面存在明显的褶皱、棱翅 ,具有丰富的微孔结构 ;粘接型炭的单位质量比表面和微孔容积下降 ,比表面和微孔孔容的损失主要与粘接剂的含量有关 ,但单位体积型炭的微孔容积和比表面积均明显增大 ;粘接剂对吸附剂微孔的堵塞主要是一种表面或孔口的涂敷作用 ,其对不同尺度的微孔具有相同的涂敷几率 。
To increase the storing amount of natural gas per volume of adsorbent, it is necessary that powdery carbon adsorbent is shaped into a monolith, Study shows binding and compressing to shape is the better way to make. the powdery adsorbent of natural gas becoming monoliths. But the influence of binder on the microstructure of the monolith adsorbent is known little. The microstructure of the bound carbon monoliths is measured by the specific surface-pore distribution and the scanning electron microscope. The influence of binder on the microstructure of the briquetting carbon is studied. And the configuration and performance relationship of the briquetting carbon adsorbent is discussed preliminarily. The results show the type and content of binder determine the microstructure of briquetting carbon. Cx 3 of briquetting carbon coil connecting structure. Its surface has obvious folds and edges. It has rich micro pores. The specific surface and micro-pore volume per mass decrease for the bound briquetting carbon. The loss of specific surface and micro-pore volume is related mainly with the binder's content. But the specific surface and micro-pore volume per volume increase obviously. It is caused by painting effect to the micro-pore orifices for binder to block adsorbent micro-pores. The painting effect has the same probability for different size of micro-pores. Powdery adsorbent has almost the same unitization curve of pore distribution with the briquetting carbon adsorbent.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2004年第12期108-110,共3页
Natural Gas Industry
基金
国家"十五"科技攻关项目 (2 0 0 1BA6 0 5A - 14 )
中国石油天然气集团公司项目 (2 0 0 1- 15 - 4 )
关键词
吸附剂
粘接剂
孔容
粉体
孔分布
微孔
比表面
几率
块体
体积
Binders
Carbon
Curve fitting
Microstructure
Natural gas
Pore size
Scanning electron microscopy
